Relays with sticky contacts should be _____________.

Relays with sticky contacts should be replaced because sticky contacts can lead to unreliable operation, resulting in intermittent performance or failure to activate or deactivate properly. Over time, sticky contacts can cause increased resistance in the circuit, leading to overheating or damaging components connected to the relay.

Replacement is often the most reliable solution, ensuring that the system operates effectively and minimizing potential risks associated with malfunctioning relays. While cleaning or adjusting might temporarily resolve the issue, these methods do not guarantee the long-term reliability and operational integrity of the relay. Therefore, replacing sticky contact relays is a best practice in HVAC and electrical systems maintenance to ensure optimal performance and safety.